# SDR UALA2012102906220

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 26, 2012
- Submitted: November 15, 2012
- Operation: Air carrier
- Aircraft: [N220UA](https://openairdocs.org/aircraft/N220UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30223
- Aircraft time: 48,348 hours, 5,936 cycles
- Engine: Pwa PW40903
- System (JASC): [2300 · Communications System](https://openairdocs.org/jasc/2300)
- Part: Rfu
- Part number: 6228849001
- Part serial: 85
- Condition: Malfunctioned
- Location: Comm System
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012102906220

## Discrepancy

DATALINK LOST NO DATA LINKS ESTABLISHED (HF, VHF, SATCOM MODES DATALINKS LOST) ADVISORY CREW COMMENTS: OCCURRED 10+ TIMES IN 4 HOURS OF FLIGHT.  REPLACED RADIO FREQUENCY UNIT REF: FIM 23-15 TASK 802 PCN 580-9105.  REF; MM 23-15-11 PG 401, OPS CHECK GOOD.

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